Construction: Superior Quality & Finish. All These Autoclaves Are Made Of 8 Gauge Aluminum The Drum Is Deep Drawn. The Lid Is Die Casted. Locking Of Lid By 6 Nuts With Rubber Gasket Seal In Between (No Metal To Metal Seal) With Safety Valves, Pressure Gauge, Flexible Metal Tubing To Exhaust Air. Includes Outer Stand, Inner Tripod Stand.